package postgresql-9.4 9.4~beta2-1build1 failed to install/upgrade: subprocess new pre-installation script returned error exit status 1

[Domen Vrankar]

Crash occured during software update on beta version of ubuntu 14.10

ProblemType: Package
DistroRelease: Ubuntu 14.10
Package: postgresql-9.4 9.4~beta2-1build1
ProcVersionSignature: Ubuntu 3.16.0-21.28-generic 3.16.4
Uname: Linux 3.16.0-21-generic x86_64
ApportVersion: 2.14.7-0ubuntu5
Architecture: amd64
Date: Fri Oct 10 17:25:41 2014
DuplicateSignature: package:postgresql-9.4:9.4~beta2-1build1:subprocess new pre-installation script returned error exit status 1
ErrorMessage: subprocess new pre-installation script returned error exit status 1
InstallationDate: Installed on 2013-09-13 (391 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
SourcePackage: postgresql-9.4
Title: package postgresql-9.4 9.4~beta2-1build1 failed to install/upgrade: subprocess new pre-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Simon THOBY (simonthoby-deactivatedaccount)]

I was updating postgresql using apt-get when this apport-gtk message appears.
Apt-get say:
Errors were encountered while processing:
 /var/cache/apt/archives/postgresql-9.4_9.4~beta3-1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

[Gordon McIntosh (100net)]

I had a remark in the terminal that said that the format had changed between version.2 and version.3 - I beleive this is the cause of the problem